Control device for flow of fluids



Sept. 8, 1931. R. M. HoRTvr-:T

CONTROL DEVICE FOR FLOW OF FLUIDS Filed March Vzo, 1930 3 sheets-sheet 1 HHH HIM

Sept. 8, 1931. R. M. HoRTvET 1,822,573

CONTROL DEVICE FOR FLOW OF FLUIDS Filed March 20, 1930 3 Sheets-Sheet 2 @j \,`A l l no C@ l 1 l l z Sept. 8; 1931.

R. M. HORTVET CONTROL DEVICE FOR FLOW OF FLUIDS 3 Sheets-Sheet 3 Filed March 2o. 1930 Patented Sept. 8, 1.931

UNITED STATES PATENT OFFICE y., RICHARD M. IrIOlEUlVE'l,` OF MINNEAPOLIS, I'IINNESOTA, ASSIGNOR TO MAHR MANU- FACTURING- COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION CONTROL DEVICE For. snowl or FLUins Application led March 20, 1930. Serial No. 437,392'.

My invention relates to control devices for flow of fluids, and an object of the invention is to provide a device of this character by means of which for example the amount of ,oil supplied to burners may be varied as desired and at the same time the amount of air supplied to the burners will be increased or decreased in proportion as the amountlof oil supplied is increased or decreased. Another lm means of which the oil and the air may be simultaneously shut olf when it is not desired to operate the burners and also by mea-ns of which thepsupply of oil andfair may be reduced to a minimum sufficient to keep the Jburners lit. The latter condition may occur for instance when the burners are used in connection with a furnace which temporarily it is not desired to supply with the normal amount of heat, but which it is not desirable to allow to become completely cooled.

The full objects and advantages of my invention will appear in connection with the detailed description thereof, and the novel 125s features of my inventive idea will be particularly pointed out in the claims.

In the accompanying drawings which illustrate one of the forms in which my invention may be embodied,-Fig. 1 is a view of the device in longitudinal vertical` section. Fig. 2 is a front elevational view. Fig. 3 is a` view in vertical section on the line 3 3 of Fig. 1 on an enlarged scale. Fig. 4 is a View in vertical section on the line 4-4 of Fig. 1 on a reduced scale. Fig. 5 is a fragmentary detail view of an air-controlling valve. Fig. 6 is a detail view showing an oil burner having oil and air supply pipes connected therewith. Fig. 7 is a top plan view showing branch oil and air supply pipes connected to main supply pipes.

Referring to the construction shown in the drawings, the numeral 10 designates an air valve housing which as shown in Fig. 4 is cylindrical except that the upper side thereof is provided with an inlet opening 12 while the lower side is provided with an outlet opening 14. An air inlet pipe 16 is secured to the opening 12 while an air delivery pipe 18 is secured to the opening 14, the pipe 18 having object is to provide a device of this kind byV ly as shown in Fig. 7 and having connected thereto a number of branch-pipes 20, each ofk which leads respectively to a corresponding liquid fuel burner 22 of which there are a number placed around a furnace, the wall of which is designated 24 in Fig. 6. The burners 22 may be of any suitable construction such as that disclosed and claimedin myv Patent No. 1,673,194 granted June 12, 1928. Extending axially through the housing 10, there is a rotatable rod 26 having spokes 28 extending out therefrom with 4segmental members 30 carried by the outer ends of the spokes. A stepped segmental valve L32 is floatingly carried upon the outer surface of the members 30 being held thereto by rivets 33, the inner ends of which are fastened to the inembers 30 and the outer ends of which fit slidably in holes in the valve 32 as shown in Fig. 5. It will be understood from Figs. l1 and 4 that the segmental valve just referred to consists of the main portion designated 32 and a number of successively stepped portions which in the embodiment shown are three in number designated respectively 34, 36, and 38. The stepped portions are produced by cutting out or omitting successively widerA portions of material along the middle part of the valve. the base portion 32 is over the outlet opening 14, passage of air into the delivery pipe 18 will be completely blocked, the pressure of air above the valve holding it firmly upon its seat. the valve, progressively greater quantities of air will be allowed to pass according to which of the stepped portions of the `valve are brought into position above the outlet opening 14. If the valve is rotated sufficiently to entirely remove it from over the opening 14, then completely unobstructed passage of air is provided for so that in addition to closed position, there are four positions for allowingpdiiferent quantities of air to pass through the outlet opening. 14.

Extending outfromthe front of the housing 10, there is a hood member 40, the shape of which is shown in Fig. 3. This hood rests upon a flange 42 formed upon the upper por- It will be understood that when By giving rotative movements to 'loo 1 tion of a valve casing 44 which casing is provided with a horizontal partition 46 whereby an upper chamber 48 and a lower chamber 50 are formed within the casing. An inlet pipe 52 for oil or other liquid fuel leads into the tension thereof. Except for convenience in manufacture and mounting, these two rods might bemadeintegrally. Therefore, in the claims they will be referred to as a single rod. The rod 58 carries four cams 60, 62, 64 and 66 arranged in successive angular position around the same as shown in Fig. 3 and corresponding respectively to successive positions ofthe air valve 82. Underneath the four cams just referred to there are valve devices respectively which at their upper ends carry Vcaps 68, 70,` 72 and'74 which are set at sucA cessively. higher positions as shown in Figs. 1 and 3 and which are heldin properly adjusted position by lock nuts 7 6. Since the four valve devices are all alike except that the caps are setatsuccessively higher levels, a detailed description of one of them will apply to all. As shown in Fig. 3, the cap 68 is held'by the lock nut 76 upon the screwthreadedupper end 77 of a plunger 78 which works ina bore made-in the upper wall ofk the casing 44. An annular projection 80 extends up from the said upper wall, this projection being internally threaded to receive external threads formed on a tubular member 82. Between the membe-r 82 and the plunger 78, there is a corrugated metal sleeve 84 known as a sylphon-diaphragm, the upper end of which is engaged by a washer 86 placed underneath a nut 88threaded on the lower portion of the screw-threaded member 77. From the lower end of the plunger 78, a stem 90 extends down through the chamber 48. The stem 90 at its lower end carries a cylindrical valve member 92 around the periphery of which there are four equally spaced longitudinal ribs 94 having a sliding it in a bore :formedV in the partition 46. A beveled annular flange 96 on the lower end of the member 92 provides a valve surface which cooperates with a beveled surface formed at the lower end of said bore. The member 92 car ries a downward projection 98 spaced around which a coiled spring 100 is interposed between the val-ve flange 96 and a recessed screw plug 102 threaded into an opening in the lower wall of the casing44. The spring 100 normally holds the valve up in closed positionlfihenthe rod 58 is turnedl to bring the cam 60 into engagement withthe cap 68, the valve is opened and oil flows from the chamber 50 up past the ribs 94 into the chamber 48 and out through the pipe 54 and branch pipes 56 to the respective burners 22. As previously indicate-d, cn account of the successive higher positions of the four caps 68, 70,72a11d 74, the four valves respectively will be opened greater distances by the operation of the cams as the rod 48 is given partial rotation and thereby permitsuccessively greater quantities of oil to flow to the burnersaccording to the degree of heat which it is desired to maintain.` The front of the hood 40 is provided withf a dial 104 through the center of which the front endof the rod 58 extends and is provided with a handle 106 secured thereto. The handle 106 carries a springrpressed detent 108 adapted to engage in any one of five recesses 110-formed in the face of the dial.

The handle 106 also carries a pointer` 1124 adapted to register with any1 one of the following notations on the dial: Closed, 1, 2, 3, and 4. It will be understood lthat-.whenthe pointer registers at any one of these notations, the detent 108 will engage in one of the recesses 110 so as to hold the devicein the selectedA position.

The operation and advantages of my 1nvention have to a large extent been indicated.`

When the pointer 112is in the position shown 1n Fig. 2,.the cams 60, 62, 64 and 66 will occupy the position shown 1n Fig. 3 sothat all of the oil valves 96.V will` be closed and the burners with enough oil to keep them lit.`

At the saine time, the stepped' portion 34 of the air valve will be brought into register with the air outlet opening 141so as to supply only the requisite amountfof air. By turning the handle 10G to bring. the pointer 112 into thepositions marked 2, 8,7 or 4]7- the caps 70, 72 or 74 will be engaged by a cam to open the corresponding `oil valve so thatsuccessively greater amounts of oil may` besupplied and at the same timethe stepped portions 36' or 38 or the full open position` ofA the air valve will be made to register with the air outlet opening 14. In this manner, the heat supplied by the burners may be controlled as desired, it' being understood that when the furnace is not to be kept in normal working condition, it may be maintained in a somewhat heated condition by placing the pointer on the indication 1. A

I claim:

1. A control device for flow of fluids conv prising a pipe line for air, a casing in said pipe line, a valve in said casing, a pipe line for oil a casing in said last mentioned pipe line, a plurality of valves in said last mentioned casing, each of said valves independently controlling the passage of oil through said casing, a rotatable rod, means for turning said rod, a support secured to said rod and to Which said air valve is-attached, and a plurality of members secured to said rod for independently controlling said oil valves and opening them respectively progressively increasing` amounts proportional to the eX- tent of opening of said air valve.

2. A control device for iovv of fluids comprising a pipe line for air, a casing in said pipe line, a valve in said casing,-a pipe line 15 for oil, a casing in said last mentioned pipe line7 a plurality of valves in said last mentioned casing. each of said valves independently controlling the passage of oil through said casing, a. rotatable rod, means for turn- 20 ing said rod, a support secured to said rod and to Which said air valve is attached, a plurality of cams secured to said rod in successive angular relation around said rod, and projections extending for different distances from said oil valves adapted to be engaged respectively by said cams for independently controlling said oil valves and opening them progressively increasing amounts proportional to the extent of opening of said air 39 VLlVG.

In testimony whereof I hereunto aliix my signature.

RICHARD M. HORTVET. 

